Planooraph co



T. J. HAYES.

WORK PRESENTING MECHANISM FOR BLINDSTITCH SEWING MACHINES.

APPLICATION 511.511 MAY 2, 1916.

1,319,218. 7 Patented 001. 21,1919.

2 SHEETS-SHEET I.

Fig.1.

1 lnvenlor. Thomas J. Hayes bYM-SVWQW Any 3.

THE CQLUMBIA PLANOGRAPH 50.. WASHINGTON. D. c.

T. J. HAYES.

WORK PRESENTING MECHANISM FOR BLINDSTITCH SEWING MACHINES. APPLICATION FILED MAY 2. 1916 1,319,218. Patented Oct. 21,1919.

2 SHEETS-SHEET FiglO.

I InvenTor. Thomas J. Hayes YJmdWyW THF cmmmn wmonmpu' on" WASHINGTON, Dt c.,

FFQIQQ THQMAS J. HAYES, OF ROSLINIDALE, MASSACHUSETTS, ASSIG-NOR TO ARBET-TER FELLING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CQRPORAI'IQN WQRKJRESENTING IYIECHANISM FOR B INnsr-rrrcn SEWING-MACHINES.

Specification in Letters ma. Patented Oct. 21, 1919 .v

pp at fi e y a 9 e il e 94,987:

To all whom it may concern:

Beit known that l, THOMAS J HAYns, a citizen of the United States, and resident of Roslindale, county "of Sulfolk, State of Massachusetts, have invented an Improvement in fork-Presenting Mechanism for Blindstitch Sewing-Machines, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in work presenting mechanism for blind stitch sewing machines for felling a superimposed layer upon a base layer of fabric, preferably of the type Comprising a on wed oscillating needle and complemental stitch forming mechanism carried above the work support.

The principal object of the invention is i under surface of said layer well back from the edge and will emerge therefrom at or beneath said edge so as to form concealed blind stitch.

A further object of the invention is so to present the base layer to the needle that the stitches in the base layer when made with a needle of standard curvature encompass a more ample portion of the surface of the fabric without passing entirely through the same.

The foregoing objects are attained in the preferred embodiment of the invention illustrated herein by a curved needle oscillating in a plane preferably inclined to theplane of the bed plate and vibrated laterally to engage in one set of stitches the base layer and in the other set of stitches the superimposed layer, the work being carried upon a work support having its work supporting face also inclined to the plane of the bed plate at a more acute angle than. that of the plane of oscillation of the needle, wherebythe main layer of fabric will be tipped up at the stitching point and the superimposed layer tipped to a still greater degree to enable the needle to enter its under surface well beyond the edge thereof,

presentation to the needle will be insured.

In the preferred embodiment of th 'invention the edge of thesuperimposed layer V is directed by a guide adapted to embrace or inclose the edge ofsaid layer adjacent the stitching point and direct it' promptly into the path of the needle notwithstanding any inaccuracyof the operator in guiding the I edge of said superimposed layer.

By the construction herein shown a super: imposed'layer may 'be felled upon a base layer so that the folded edge of the superimposed layer will lie a'suitable distance over the line of stitching, thus producing such seams asthose which secure the lining to the bottom of mens coats. The guide for the superimposed layer is carried prefers ably but not necessarily by a presser foot secured to the bottom of the hook bracket,

the 'presser. foot being so formed as to present inclined faces to engage the upper surface of thejbase and superimposed layers n cooperation with the inclined work supporting surface of the work support, the guid ng surface for the superimposed layer being so constructed as to, cause the edge the edge of the layer so that its proper Another feature of the invention consists in providingmeans. for. guiding the strands of the loop of needle thread so as to insure its proper manipulation by the hook and to prevent said loop from being cast over the hook shaft when the machine is running idly. This is accomplished by providing means for holding the strands of the loop at substantially the same angle to the central plane of the hook, notwithstanding the varying positions ofjthe needle as the same .is being withdrawn from loop forming position,@'

Other objects and features of the invens tionwill more'fnlly appear from the follow- I ing desci-iption, the accompanying drawing, and will be pointed out in the annexed claims;

In the drawings: V

F igure 1 is n end el at on sh w ng be? 'pportionof thelayer to b e tilted upwardly the portion of the guide near the stitching points belng formed to embrace or inclose tain parts in section of a blind stitch sewing machine embodying my invention,

Fig. 2 is a rear elevation of a preferred form of presser foot and the cooperating work support showing the hook bracket in dotted lines,

Fig. 3 is a front elevation of the same, showing the manner in which the presser foot is secured to the hook bracket,

Fig. is a plan view of the presser foot showing the position of the needle in penetrating the superimposed layer,

Fig. 5 is a similar view showing the position of the needle in penetrating the base layer,

Fig. 6 is a view of the bottom of the presser foot,

Fig. 7 is a vertical median sectional view of the presser foot looking inward and showing the needle guide and needle,

Fig. 8 is a similar vertical sectional view looking in the opposite direction,

Fig. 9 is an enlarged transverse vertical sectional view of the presser foot showing also the position of the base and superimposed layers with the needle entering the superimposed layer, and,

Fig. 10 is a similar view showing the needle entering the base layer which is presented in its path by a bender.

The blind stitch sewing machine illustrated in the accompanying drawings comprises a base plate 1 having the usual stand 2 and overhanging arm terminating in a head 3 which supports a curved oscillating needle adapted to be oscillated in different planes to engage the base and superimposed layers and complementary stitch forming mechanism, which is in the form of a rotary bobbin-containing hook 4 carried by a shaft journaled in a hook bracket 5 which de-- pends from and preferably is made integral with the head 3.

The needle mechanism may be of any con venient type and preferably comprises a curved needle 6 carried at the lower end of a needle bar 7 which is pivotably mounted upon an inclined stud 8 carried by a post 9 which is mounted in a cross head adapted to be reciprocated laterally in respect to the line of stitching so that the needle will be oscillated in different planes inclined to the vertical plane of the line of stitching to engage the base and superimposed layers. But it will be understood that other mechanism may be utilized to oscillate the needle in planes having difierent angles or inclinations to the vertical plane of the line of stitching or to cause the needle to vibrate about a vertical axis so as to engage in one set ofstitches the base layer and in another set of stitches the superimposed layer, within the meaning and scope of the claims hereto annexed.

The needle may be oscillated in any convenient manner as through a link 10 connected to suitable mechanism actuated by a main shaft of the machine.

The work is presented to the needle by a preferably yielding work support 11 and cooperating feed dog 12, each of which is provided with a work engaging face inclined transversely to the vertical plane of the line of stitching, the angle of inclination of said work support being somewhat greater than that of the plane of oscillation of the needle. A presser foot having a correspondingly in clined surface cooperates with the inclined work support and feed dog and is provided with a special guide adapted to embrace or inclose the edge of the superimposed layer adjacent to the stitching point and to retain said edge in proper position before and during the formation of the stitches in the superimposed layer.

By reason of the fact that both the base and superimposed layers are inclined relatively to the vertical plane of the line of stitching the needle may be oscillated in a plane less abruptly inclined to the vertical plane of the line of stitching thus avoiding the necessity of specially designed mechanism for oscillating the needle which would be required if the work were carried upon a horizontal work support with the plane of oscillation of the needle at the same angle of inclination relative thereto.

This inclination of the work support facilitates elevating or rolling up the edge of the superimposedlayer so that the needle may be caused to enter beneath said layer farther back from its edge. It also enables the needle to pass through a greater amount of material of the base layer adjacent its surface without passing through the opposite face of said layer than is usual in blind stitching machines, thereby affording a more secure anchorage for the thread.

As illustrated in the accompanying drawings the superimposed layer is directed by a guide formed in a presser foot of special construction. The preferred form of presser foot shown herein is provided with a heel portion 13 having beveled upper edges 14 adapted to fit tightly in a socket or seat in the bottom of the hook bracket, thus proaccuratelythe foot upon the hook bracket, and with upwardly extending lugs 15 provided with holes 16 to receive screws 17 by which the presser foot is secured to the hook bracket. The major toe portion 18 of the presser foot preferably is of greater length ,viding a convenient means for assembling V friction of the needle upon the major toe of the presser foot causes it to wear-more rapidly than the minor toe portion, it is preferably formed separately from the body portion of the foot and securedthereto by an upwardly extending lug 15 secured to one of the lugs 15 and the hook bracket by one i recessed adjacent its base to provide a throat 23 through which the bender may thrust the base layer into the path of the needle.

The minor toe portion of the presser foot is provided with a surface 25, convexedly curved outwardly and downwardly to "guide and crowd the upper surfaces and top of the superimposed layer toward the needle throat and provide an ample amount of material at the stitching point to insure proper penetration of the needle in the-superimposed layerl The curved surface 25 merges into a similarly curved wall of a recess 26 in the under face of the body of the presser foot back of the throat opening '23. The inclined work support is provided at and beyond the titching point with a cooperating concaved recess 26 so that the material passing under the presser foot after the stitches have been taken will not be sharply folded asin usual construction but will present a softer effect. The freedom of flexibility thus given to the material by the recesses 26 and 26* permit the stitch to be set more uniformly and with less tension. upon the thread than has heretofore been found necessary. The upper portion of the minor toe is provided with a guide adapted to embrace the edge of the superimposed layer in advance of and closely-adjacent t0 the stitching point. The

guide referably isformed of a separate plate 2 secured by screws 28 to the top of the minor toe portion opposite the throat 23 but may be made integral with the resser foot or if desired carried upon an" inc ependent arm connected to a suitable support; The guide-plate 27 extends beyond the inner edge of the minor toe portion and over or closely adjacent to the path followed by the needle in penetrating the superimposed layer and preferably is shaped to form a conoidal concaved guiding surface 29 to embrace or inclose the edge of the superimposed layer and is thence extended downwardly sothat its lower portion 30 rests upon the needle guiding flange or rib 21 of themajor toe portion. This construction serves to increase the rigidity of the foot as a whole and also positively prevents the edge of the superimposed layer from extending into the path of the needle before it reaches the stitching point.

It will be noted by reference to the drawing, particularlyFigs. 6, 9 and';10'that the;

concave edgeeembracing portion 29 of the ing in a-plane inclined to the work support,- ing surface, of the work-support will enter the lower face of the superimposed layer well back from the edge thereof and will v emerge from said layer at points uniformly spaced and also at a considerable distance from the edge of the superimposed layer,

thus providing an entirely concealed seam.

Byreasonof the fact that the edge of the superimposed layer is tipped up relatively to the baselayer, in the manner described,

the needle will operate properly with a less amount of lateral vibration'or shogging than has heretofore been necessitated so that the bender may be positioned partially beneath the minor toe portion audits upwardomovement limited thereby to insure uniformity in the stitches in the base layer. A suitable recess 250 may be formed in the guidingrsurface 25 of-the minor toe portion to receive the material thrust upwardly by the bender.

The central portion of the presser foot is cut away to form a recess 31 to accommodate the needle,"the underwall 32 of the recess being beveled or curved to form a guide and support for the-needle as it emerges from the work.

In the construction illustrated here in the planeof rotation of the beak of the revolving hook is substantially tangential to the path of the needle at the loop-taking point; When the needle is retracted after thetloop is entered by the beak of the hook the strands of the loop are carried at a constantly increasing angle to the'central pla-ne ofthe hook so that it is'found in practice when'themachine is running idlyor when a stitch in the fabric has been skipped, the loop of needle thread may be carried around the hookand thrown over the hook shaft instead of being cast off by the hook in the proper manner. This is prevented in the present construction by a bar or strap. 33 secured by 7 screws 34 to the body portion of the presser foot and across the needle receiving recess 31. The strands of the loop are held down by the bar 33 so that the loop is maintained in a definite position in respect toithe hook.

Inthe operation of the machine the body of the fabric is carried upon the usual horizontal bed plate of the machine. By reason of the inclined position of the work supporting surface of the work support however, that portion of the work which is aboutto be presented to the stitch forming mechanism is tilted to an agle to the plane of the-bed plate and the edge of the superimposed layer is bent up or rolled up by the operator to a still greater angle of inclination to the horizontal. By reason of this tilting of the work support at the stitching point, the needle, in

one set of stitches, is enabled to catch a greater amount of material in the base layer without penetrating more deeply into the same, and in the other set of stitches enters farther under the edge of the superimposed layer than has heretofore been accomplished, emerging from said layer at points well beneath the edge. The guide which engages and embraces the edge of the superimposed layer serves more accurately to position said edge and to present the same to the needle and obviates the necessity for the edge guide for the superimposed layer which heretofore has been placed upon the major toe portion of the presser foot. The latitude of movement given to the superimposed layer after the stitches have been formed therein permits the superimposed layer to present a softer and more pleasing effect than has heretofore been produced.

It is to be understood that the embodiment of the invention disclosed herein is illustrative and not restrictive and that various changes in form and construction may be made within the meaning and scope of the following claims which are designed broadly to cover any construction in which the needle is reciprocated or oscillated above a work support having its surface inclined to the vertical plane of the line of stitching and also to cover broadly any form of guide for the superimposed layer which embraces and surrounds the edge of said layer in advance of and adjacent to the point of stitching, and such other features of novel construction as are herein specified in the claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A blind stitch sewingmachine comprising a curved needle and means for oscillating the same in the general direction of the line of feed, a presser foot and a work support having cooperating work engaging faces inclined transversely to the vertical plane of the line of stitching.

2. A blind stitch sewing machine comprising a curved needle, means for oscillating the same in the general direction of the line of feed, means for vibrating said needle to form two rows of stitches, a presser foot and a work support having cooperating work engaging faces inclined to the vertical plane of the line of stitching.

3. A blind stitch sewing machine for felling a superimposed layer upon a base layer of material comprising a bed plate, a curved oscillating and laterally vibrating needle and complementary stitch forming mechanism located above sald bed plate, a presser foot and a work support having cooperating work engaging faces inclined to the plane of the bed plate and to the vertical plane of the line of stitching and means operating superimposed layer to the needle at the stitching points.

4. A blind stitch sewing machine for felling a superimposed layer upon a base layer of material comprlsing a bed plate, a curved A to present respectively the base layer and the from the base layer adjacent the stitching point whereby the needle will penetrate the superimposed layer beneath and well beyond its edge and will emerge therefrom beneath said edge to produce a concealed stitch.

5. A blind stitch sewing machine for felling a superimposed layer upon a base layer of material comprising a bed plate, a curved oscillating needle and complementary stitch forming mechanism located above said bed plate, a work support having its work supporting surface inclined to the plane of the bed plate and to the vertical plane of the line of stitching, means for causing the needle to oscillate in planes substantially parallel to the line of stitching and inclined to the work supporting surface of the work support, and means for presenting the base and superimposed layers in the paths of the needle.

6. A blind stitch sewing machine comprising a bed plate, a head carrying a curved oscillating needle and a bracket supporting complementary stitch forming mechanism above said bed plate, a work support carried by said bed plate and having a work supporting surface inclined to the plane of the bed plate and the vertical plane of the line of stitching, a presser foot having an inclined work engaging face adapted to cooperate with said work support and means for permitting relatively yielding movement between the work support and presser foot.

7. A blind stitch sewing machine comprising a bed plate and an overhanging head carrying a curved oscillating needle and a bracket supporting complementary stitch forming mechanism, a work support having its work supporting surface inclined to the plane of the bed plate and to the vertical plane of the line of stitching, and a presser foot rigidly secured to said bracket having an inclined work engaging face adapted to cooperate with said work support.

8. A blind stitch sewing machine comprising a bed plate and an overhanging head carrying a curved oscillating needle and a bracket supporting complementary stitch forming mechanism, a work support having its work supporting surface inclined to the King a superimposed layer upon a base layer iof material comprising a bed plate anda curved oscillating needle and complementary "stitchforming mechanism located above said surfaces of the work support and presser foot. c

9. A blind stitch sewing machine for fellbed plate, a work support having its work supporting surface'inclinedto the bed plate andto the vertical plane of the line of stitching, means forcausing'the needle to reciprocate in different planes, and means located adjacent the stitching point extending over and adapted to embrace the edge of the superimposed layer and present the under surface ofsaid layer in the path of the needle when 1t 1s reciprocated in one of said planes. r I V 10. A blind stitch sewing machine for felling a su perimposed layer upon a base layer of materialcomprising a presser foot and a work support each havlngits' workengaging surface inclined transversely to the vertical plane of the line of stitchingan-d a curved needle oscillating in the general direction of the line of feed and operating fin a plane having a different inclination to the vertical plane of the line of stitching than'that of the work supporting surface of the work support. c

2 11. A blind stitch sewingmachine for felling a superimposed layer upon a: base layer of material comprising a presser foot and a work support having cooperating work engagingsurfaces inclined to the vertical plane of the lineof stitching, a curved needle and means for oscillating the samein different planes each of which isinclined to the work engaging surface of the work support.

12. A blind stitch sewing machine for fellinga superimposed layer upon a base layer of material comprising a presser foot and a work support having cooperating work engaging faces inclined to the vertical plane of the line of stitch, a curved needle, and means for oscillating thesame in different planes, each of which is inclined to the vertical plane of the line of stitching,

and lies between the inclined plane of the work engaging surface of the worksupport and said vertical plane of the lineofstitch- A' blind stitch sewing machine for felling a superimposed layer of material upon a base layer comprising a bed plate, a curved oscillating and laterally vibrating needle and complementary stitch forming;

mechanismlocated above-the bed plate, a work supporthavingits Work supporting surface inclined to the. Plane of the bed plate and to-the vertical plane of-the line of stitching and a presser foot having a guide located adjacent to and in advance of the stitching point extending over and adapted to embrace the edge of the superimposed layer and rollthe sameupwardly whereby the needle is enabled to penetrate and emerge from the under surface of said layer at points weir back; from the edge thereof.

14. v A blind stitch: sewing inachine; for

felling a superimposed layer of material upon a base layer comprising a bed plate, a curved oscillating and laterally vibrating needle and complementary stitch forming mechanism located: above the bed plate, a

work support; having its "work supporting surface inclined'to thefplane of the bed plate andto the vertical plane of the line of stitching and va-presser foot having a guide located adjacentlto and; in advance jofthe stitching. point adaptedztonembrace the edge ofthe superimposed layer and roll the, same upwardly whereby theneedle is enabled'to'penetrate andfemerge from the under surface of layer at points well back from the edge -thereof and complev mentary recesses in said work support and opresser foot adapted to permit the folded e to p freely whereby creasing of said folded'edg'e is avoided}.

.15. In ablind stitch 'sewing-machi ne for felling" a superimposedjlayer upon abase layer ofmaterial. comprising a. curved oscillating needle and complementary stitch forming mechanism, aipresser. foot having guiding means extending overand adapted 1 to embrace and elevate the edge of thesuperimposedlayer in advance. of and adj acent to the point atwhichthe needle penetrates said layer, whereby uniformity in the placingjof the stitches in the said layeris insured;

; 16. In a blind stitch sewing machine for felling a superimposed layer upon a base layer of material comprising a curved oscillating needle and complementary stitch'115 forming; mechanism, a presser foot having guiding means adapted to engage the upper surface of the sup'erimposed'layer and crowd the edge thereof toward thestitching polnt,

and means, extending therefrom to embrace the edge of said superimposed layer adjacent to and inadvance of the point at which the needle penetrates said layenwhereby the points of penetration of the needle nto the under surface of the superimposed layer-at a uniform distance from the'edge thereof will be maintained and evenness in location of the stitches insured.

17. In a blind stitch sewing machine for v, I, felling a superimposed layer upon a base under surface of 110 layer of material comprising a curved oscillating and laterally vibrating needle and complementary stitch forming mechanism, a. presser foot having a heel portion and toe portions extending forwardly therefrom, one of said portions being provided with a needle guide and recessed to provide a throat and the other toe portion being provided with a guiding means overlying said needle guide having a conoidal surface adapted to embrace and raise the edge of the superimposed layer adjacent to and in advance of the point at which the needle enters said layer whereby the points of penetration and emergence of the needle will be located well back from the edge of said layer.

18. In a blind stitch sewing machine for felling a superimposed layer upon a base layer of material, comprising a curved oscillating and laterally vibrating needle and complementary stitch forming mechanism, a presser foot having a heel portion and toe portions extending forwardly therefrom, one of said portions having at its edge a needle guiding rib and recessed to provide a throat and the other toe portion provided with a convexedly curved guiding surface adapted to engage the upper surface of the superimposed layer and crowd the edge of said layer toward the stitching point and with a downwardly curved guide to embrace the edge of said superimposed layer in advance of and adjacent to the point at which the needle enters said layer.

19. In a blind stitch sewing machine for felling a superimposed layer upon a base layer of material, comprising a curved oscillating and laterally vibrating needle and complementary stitch forming mechanism, a presser foot having a heel portion and toe portions extending forwardly therefrom, one of said toe portions being recessed to provide a throat and also provided with a rearwardlyextending needle guiding rib, the other toe portion being provided with a conoidal guiding means overlying the path of the needle and resting upon said needle guiding rib adaptedto embrace the edge of the superimposed layer in advance of and adjacent to the point at which the needle enters said layer.

20. Ina blind stitch sewing machine for felling a superimposed layer upon a base layer of material comprising a curved oscillating and laterally vibrating needle, a presser foot comprising a heel portion and forwardly extending toe portions one of said toe portions being recessed to provide a throat and the other toe portion being provided adjacent said throat with a guide adapted to embrace and raise'the edge of the superimposed layer to permit'the needle to penetrate the under. surface of said layer well back from its edge, the. lower surface of said heel portion being recessed beyondsaid throat to permit the folded edge of the superimposed layer to pass freely beneath said presser foot.

7 21. In a blind stitch sewing machine for felling a superimposed layer upon a vbase layer of material comprising a curved 22. In a blind stitch sewing machine for felling a superimposed layer upon a base layer of material comprising a curved oscillating and laterally vibrating needle, a presser foot comprising a heel portion and forwardly extending toe portions provided with a needle throat, one of said toe portions being provided with a convexedly curved guiding surface extending from in front of the needle throat rearwardly, and merging into a recess beyond said throat and acting to crowd the superimposed layer toward the other toe'of the presser foot whereby the edge of the superimposed layer is bent upwardly into the path of the needle and a guideadapted to embrace and raise the edge of the superimposed layer to permit the needle to penetrate the under surfaceofsaid layer well back from the edge thereof.

23. In a blind stitch sewing machine comprising a curved oscillating needle and a cooperatin hook having a beak rotating ina plane su' stantially tangential to the path of the needle, means for maintaining the strands of the loop in a substantially definite relation to the plane of rotation of the hook. V

24. In a blind stitch sewing machine comprising a head carrying a curved oscillating needle and a depending hook bracket, a hook mounted in said bracket having its beak po sitioned to rotate in a plane substantially tangential to the path of the needle, a presser foot carried by said bracket, and means on said presser foot adapted to engage the strands forming the loop of needle thread engaged by said hook, and to maintain said strands in a substantially definite relation to the plane of the hook as the needle recedes. y

25. In a blind stitch sewing machine for felling a superimposed layer upon a base layer of fabric comprising a curved oscillating and laterally vibrating needle and complemental stitch forming mechanism located above the 126d plate, a work .130

support and cooperating presser foot having their Work engaging surfaces inclined to the plane of the bed plate, one of the toes of said presser foot being recessed to form a throat and the other toe being provided adjacent said throat With guiding means for the superimposed layer overlying the path of a bender, whereby the upward movement of the latter Will be limited and uniformity of penetration in the base layer 10 insured.

In testimony whereof, I havesigned my name to this specification.

THOMAS J. HAYES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

